Spectators are welcome to attend, for free, the competition at the exclusive Pittsburgh Pinball League's Clubhouse. Watch as 560 of the best silver-ball stars from more than 35 states compete for the prize — a spot in the National Championship at the Pinball Hall of Fame, in Las Vegas, next month.

Having beaten out the other 9,900 players who first entered the series, these pinball wizards know what they're doing and yearn for the title. Come flip out with them.

Doors for the event open at 10 a.m. and the competition begins at 11:30.